Optimization of the concrete through the addition of nanosilice, using aggregates of the cantera de Añashuayco de Arequipa

Abstract

The present research work is carried out using the experimental study to evaluate the concrete made with Aggregates of the Quarry with Addition of Nanosilica containing micro-fine nanoparticles of amorphous silica dioxide (Si O2). Nanosilica has pozzolanic properties that, upon contact with water, reacts with hydrated cement to form more particles of C-S-H (gel), which reduces porosity by partially filling the pores to refine the structure and therefore gives us greater compressive strength. The recommendation of this study is to implement low-cost, low-rise housing construction.

The microstructure properties of the cement paste are improved with the addition of Nanosilica. Nanoparticles have high specific surface areas, and their surfaces are very active; an intense pozzolanic reaction between Nanosilica and CH, would accelerate the pozzolanic reactions between SIO2 and water molecules. Therefore, the smaller the pore volume, the higher the compressive strength and water absorption capacity of Nanosilica-modified pastes results.

The volume of the pores was reduced along with the increase of the Nanosilica dose. The cement and sand mixture without Nanosilica after 7 days of curing, shows a porous structure.